Transistor Models

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Transistor Models

This section is incomplete and probably even out of date. Maybe someone could fix it???

Note: $cdk_dir == toplevel directory of NCSU CDK

$cdk_dir/cdssetup/cdsenv sets the default model path to include $cdk_dir/models/simname, where simname is either "hspice" or "spectre". Under each simulator's directory, there are several "corner" directories:

  • fast
  • slow
  • nom
  • fastN_slowP
  • slowN_fastP

To change the model path to a particular one of these directories, use the form defined in the SKILL file $cdk_dir/skill/menus/artist/ You access it in Artist via the "Setup -> Model corner..." menu entry. Simply select the desired corner and the model path will be set to the correct path.

The simulators' directories also contain a "standalone" directory, which contain model files suitable for standalone simulation (i.e., they are not in cdsspice syntax).

There is also the directory $cdk_dir/models/MOSIS_reports/, which contains the raw MOSIS parametric wafer reports from which we pulled the model data.

Format of .m files:

NOTE: There must be no spaces on either side of the equal sign!

* example of model file syntax
.model modelName [np]mos level=X &
parameter1=x &
parameter2=y &

--Slipa 12:21, 27 February 2006 (EST)